[10] RFR JDK-6461834: Minimize WindowsLookAndFeel classes included with Unix JDKs

[Prasanta Sadhukhan]

Hi All,

Please review a fix for an issue whereby it is seen that 
WindowsLookAndFeel classes are built for non-windows platform,
where it is not needed.
Proposed fix is to remove building these classes for non-windows platform.

JPRT build is successful. Also, fixed the regression tests which expects 
this classes to be available in non-unix platform.

Bug: https://bugs.openjdk.java.net/browse/JDK-6461834
webrev: http://cr.openjdk.java.net/~psadhukhan/6461834/00/

There are some closed regression test which will be taken care after 
this in a separate crucible review.

Regards
Prasanta